ï»¿ What is α-helix ? from Biology Biomolecules Class 11 Assam Board

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What is α-helix ?

α-helix is a type of secondary structure. It is a polypeptide chain coiled like a spiral due to the formation of hydrogen bonds between adjacent CO and NH groups. It is found in hairs, nails, feathers, horns, skin of vertebrates, hooves, claws etc.

Functions of a helix. It provides flexibility, elasticity and stability to polypeptide chain.
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Name one monosaccharide which provides energy ?

Glucose
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What are major elements of a cell ?

Carbon, hydrogen, oxygen and nitrogen are the major elements of a cell.
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What is the general formula of carbohydrates ?

The carbohydrate has a general formula - CnH2nOn Or (CH2O)n.
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Give the names of two monosaccharide sugars.

Fructose and glucose are two monosaccharides
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What is the percentage of nucleic acids in cells ?

5 - 7 percent
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